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46561 (1991 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2046561
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2731208440696808 4.2842e-08  
a 2.36793752930672 7.8785e-09 au
q 1.721204432598194 1.0404e-07 au
i 13.03668191940338 3.6943e-06 deg
node 151.8670347084658 1.5892e-05 deg
peri 187.3059712573901 1.7081e-05 deg
M 325.5122494313757 6.0504e-06 deg
tp 2459128.001753035479
(2020-Oct-05.50175304)
2.242e-05 TDB
period 1330.92562825861
3.64
6.6423e-06
1.819e-08
d
yr
n .2704884422963782 1.3499e-09 deg/d
Q 3.014670626015246 1.003e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      10586 days (28.98 yr)  
   first obs. used      1991-08-07  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56918  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 04:22:42  

Additional Information
 Earth MOID = .712747 au 
 Jupiter MOID = 2.38842 au 
 T_jup = 3.462 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457369.5 (2015-Dec-13.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2726036557473228 4.2851e-08  
q 1.722277322376741 1.0396e-07 au
tp 2457798.343720054576
(2017-Feb-13.84372005)
2.2935e-05 TDB
node 151.8956424412436 1.5895e-05 deg
peri 187.4315730262013 1.709e-05 deg
i 13.0350471775087 3.6938e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      10586 days (28.98 yr)  
   first obs. used      1991-08-07  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56918  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 04:22:42  

Additional Information
 Jupiter MOID = 2.38842 au 
 T_jup = 3.462 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.836192157562716E-15 -4.449228359244469E-15 -1.182671108664636E-13 -3.880094069617392E-14 9.35829055529808E-14 -8.804119797400778E-15
q -4.449228359244469E-15 1.080793337307832E-14 2.510871523608601E-13 9.274075247945159E-14 -2.372066927178587E-13 2.109302481372171E-14
tp -1.182671108664636E-13 2.510871523608601E-13 5.2601892410962E-10 1.036918939763883E-11 1.432166269230477E-10 3.447143062859609E-12
node -3.880094069617392E-14 9.274075247945159E-14 1.036918939763883E-11 2.526465297833841E-10 -2.441983663670413E-10 -5.269146601332574E-12
peri 9.35829055529808E-14 -2.372066927178587E-13 1.432166269230477E-10 -2.441983663670413E-10 2.920641190784951E-10 5.882565053028284E-12
i -8.804119797400778E-15 2.109302481372171E-14 3.447143062859609E-12 -5.269146601332574E-12 5.882565053028284E-12 1.364386878385423E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO337630  
diameter diameter 4.710 km 1.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.069   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

46561 (1991 RQ)          Discovered 1991-Sep-07 by Helin, E. F. at Palomar
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RQ = 1991 PN16 = 2000 AA182 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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